What are all the common factors of 36 and 56?

a.
1, 2, 4

b.
1, 2

c.
1, 2, 4, 8

d.
1, 2, 3, 4, 9

what is 243 written as a power of a number?

a.
813

b.
34

c.
35

d.
53

what is the prime factorization of 126?

a.
22 • 3 • 7

b.
2 • 32 • 7

c.
2 • 3 • 7

d.
2 • 32 • 72